Improvement in sewing-machines



2Sheets-Sheet1. WILLIAM HEIDENTHAL.

Sewing-Machine.

No.127765, Patentedjunell,l872.l

UNITED STATES` PATENT OEEICE. A

WILLIAM IIEIDENTHAL, OE PORT JERvIs, NEW YORK, AssICNOR OE ONE- HALE OE nrs RICHT To WILLIAM s. CARPENTER7 OE sAME PLACE.

` IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 127,765, dated June ll, 1872.

SPECIFICATION. To all whom it may concer-n:

Be it known that I, WILLIAM HEIDENTHAL, assignor to himself and WILLIAM S. CARPEN- TER, of Port Jervis, in the county of Orange and State of New York, have invented certain -newand useful Improvements in Sewing-Ma- 2 shows the reverse side of the saine.

Plate 2.4Fig. 3 shows a face view of the rorating shuttle-carrier. Fig. 4. is an inside face view of the hinged cap, showing the grooves or recesses, one for the needle to work in and the other to hold the shuttle-thread in a desired position. Fig. 5 is the reverse side of the rotating shuttle-carrier, showing the eccentric groove for operating the needle-arm, and the cam on the shaft to operate thefeed. Fig. 6 shows the front view of the feed-working mechanism and eccentric groove in the rotating shuttle-carrier in dotted lines. Fig. 7 shows the double-acting cam on abroken-off piece of the driving-shaft. Fig. 8 is a brokeno' front-end side view of the needle-arm,- showing the method of securing the needle truly. Fig. 9 shows a front-end sectional View of the saine.

My invention relates to sewing-machines which make the double-lock single-knot stitch by means of a curved needle, and a rotating shuttle, which moves in the same direction with the feed 5 and it consists in the construction of` the feed mechanism and manner of adjusting the same, and the auxiliary device for giving a lateral movement to the roughenedv plate A and driven by the ily and band wheel B and single-shaft G, on one end of which is the eccentric cam-wheel D having in its rear side a sunken groove, E, in which the under bar F of the needle-arm F works to impart motion to the needle f. On the reverse or face side of the cam-wheel D is made arecess, d, vinto which the shuttle is itted that carries the under thread to form the double-thread lock-stitch. The shuttle rotates in the same direction that the feed moves the fabric being sewn. The face of the disk-wheel or rotating shuttle-carrier D iscovered by a hinged faceplate, G, in which is a groove, a, for the curved needle f, and there is also another groove or recess, b, at the rear of the needle-groove a, in which the shuttle-thread is placed by the action of a slight projecting ange, c, on one side of the outer edge of the rotating disk, while the shuttle is carried round. The shuttle threadis wrapped around the triangular division-wall between the two grooves a and b and when the shuttle again comes round, and the -feed takes place, that portion of the shuttlethread lying in the groove a is, by means of an inclined portion of the top of the wall, rolled out, so that the shuttle passes behind it and through the loop of its own thread, wound, as before stated, about the wall, and forms a knot. The point of the shuttle passes through its own loop and the loop of the needle-thread at the same time The face-plate G is provided with a circular groove, e e, for the projecting ange c to pass round in without touching. The shuttle-race g gis slightly sunken to correspond with the curve of the needle, to which the face of the shuttle is fitted, so that the point of the shuttle runs in the deepest part of this groove; and the needlethread, being drawn taut, forms a cord from the eye on the curved side of the needle, affords the point of the shuttle sufficient space to enter and pass between the thread and the needle, so that it cannot miss a stitch. The face-plate G is hingedito the under side of the table-plate A, so that it can be opened to insert the shuttle; and is held up to the face of the disk D by a spring-catch 19 at the bottom, pivoted to the suspended post H, so that the shuttle is pressed into the pocket or recess d, to prevent itmaking any noise while passing around, although the space is large enough to allow the needle-thread to pass freely around it. There is a small recess in the front end turned at a right angle at the front or feeding,

end, and which rests in. a notch in the vertically-movable plate. The long bar I extends back on the under side of the plate A and parallel with it and the driving-shaft G, and is provided with a depending slotted arm, j, and is pivoted to another slotted swinging lever. This arm is attached by a thumb-screw to a pivoted plate, fm, secured to the plate K, projecting from the under side of the plate or table A, so that the thumb-screw and nut can be moved in the slot l of the arm and the slot of the pivoted plate, to admit the necessary lateral motion of the feed-bar I, for embroidery and button-holes. two pins, o o, is fitted onto the pivoted plate 'm by a square pin, which passes through a slot in the plate K. The tumbler M is secured on the pivot-bar by a thumb-nut, u, so that it can be easily removed when not required for embroidery or working button-holes. The projecting pins o o on the tumbler, if button-holes are to be worked, when a lateral feed is desired, are placed so as to work alternately intothe grooves p p in the double-acting cam N ou the driving-shaft C. The cams engage the pins or toes alternately, oscillate the tumbler, and move it and theoscillating-plate and feedbar I laterally with it. The cloth-feeding bar I is operated by movable plate P on the under side of the table-plate A, near the rear side of the cam-wheel D. The plate P has a square opening, q, through the lower portion of it, to receive the cam Q on the shaft C, and is sustained by a pin in the lug It passing through a slot r at the upper corner. A hooked bar,

S, is pivoted to a lug, T, under the table, and

A tumbler, M, having the bar is moved by the cam Q. The plate P has an adjustable screw, u, in its slot jv, against which the hooked bar S bears and causes the plate P to move laterally to operate the feed I to make stitches of different lengths. The roughened-surface feed-bar I rests in a notch, W, in the top of the movable plate P, and works with it, being raised up and carried forward by the cam Q and hooked bar S, and down and backward by the spiral spring t, connected with the feed-bar I, and the hanger H, which forms one of the bearings for the shaft C to run in.

What I claim as my invention is- The combination of the rotary shuttle-carrier D, itsflange c, and shuttle, with the faceplate G, provided with grooves a and b and dividing-wall, as and for the purposes herein set forth. ,Y

2. The disk-wheel D having a recess, d, in its face for carrying a shuttle, and an eccentric groove Ein its opposite side for operating the needle-arm, substantially as herein described.

3. The hinged face-plate G and shuttle-race g having in its face vertical grooves a and b, the former to receive the needle in its downward movement, and the latter to receive the shuttle-thread and hold it, asset forth, in position for the shuttle to pass through it.

4. The combination of the feed-bar I, movable plate P, the` hooked lever S, the adjustable thumb-nut u, and the cam Q, constructed and arranged for operating the feed, as set forth.

5. The tumbler M, combined with the doublegrooved cam N, the pivoted plate m, andthe feed-bar I with its slotted arm j, connected by a pin with the plate, for givin g a transverse lateral movement to the feed, for working button-holes and embroidery.

In testimony whereof I have hereunto subscribed my name this 9th day of April, 1872. Witnesses: WM. HEIDENTHAL. W. J. KETCHUM, v

J. B. WOODRUFF. 

